How resources are grouped on the basis of origin and exhaustibility? Give examples of each type.
I. On the basis of origin: Resources are grouped into natural and human-made
- Natural resources are of two types :
- Biotic resources: These are obtained from biosphere and have life as human beings. Animals are biotic resources.
- Abiotic resources: They consist of non-living things such as land, water, soil and metals.
- Human-made resources are created by humans such as machines, buildings and paintings.
II. On the basis of exhaustibility: These are of two types :
- Renewable resources: These can be renewed or reproduced by physical, chemical or mechanical process. Examples are solar and wind energy, water and forests. The renewable resources may further be divided into continuous or flow and biological. Continuous or flow resources are wind and water. Biological resources are vegetation (forests) and wildlife.
- Non-renewable resources: They exhaust and take millions of years in their formation Examples are minerals and fossil fuel.